Sparking plug.



7N0. 888,711 PATBNTBD MAY 26, 1908.

L. KANTROWITZ.

$PARKING PLUG.

APPLICATION FILED MAR.6.1907.

In ventor:

{my W- circuited. As is well known, the carboniz which is caused by sootdeposits during the between the tips ofthe electrodes.

, repaired or replaced.

scribed;

in connection withthe illustration in the tended up nearly to its tip'.The other ele'c- ,mg had to the-accompanying drawings, formsparlil'ig'p'iug" veifigines, and the like in of an electric sparkiiinwhichsparking. plug said path of lower resistance without pro -ments,the insulation around one of the. elecing a, stem 1) and thumb nut c,which nut holds the stem and .casing together. One of I the electrodes(2 preferably projects from the.

the plug. The stein may be made of'po rc'e- I KAusrRoWrrz,

once'i'h: v H yLours KA-NTROWITZ, "a' States and a resident I t nhattan, of the city of Q p 4 unty and State of New Yo av certain new anduseful Improvement parking Plugs, of which w,- ii-wt LEA the follow ng1s a specification, reference ber m-ail A mg a part hereof. p

The ob ect ofthe invention is to provide, a

which the combustion is'effected by means the electrodes shall nlo'treadily become short ing of the electrodes and adjacent parts,

operation of internal combustion engines, soon produces a path of lowerresistance for the lgnitlng clrcuit than that across the gap The hightension current then passes through ducing the re uired sparln The sparkplugthus iails to e feet the ignition and has to be In accordancew1ththe present improvetrodes is provided with a vibratory orotherwisemovable member or members in orderto prevent the permanent lodg'ment ofsoot, and in the present case this is effected bysurrounding one of theelectrodes with nonconductingplate's as. willpresently be'de- Theinvention will be more fully described drawings of a suitablevembodiment of the invention; 1

' In said drawings the.single.figure reprs sents partly in section andpartly in elevation,' a sparking plug containing the improvements.

, The plug may have theusual body or cas inner end ofthe casinga and'iscovered with a suitable'insulatmg material e wlnch s-eX:

tr'ode j is preferably straight and projects substantially fromthecenter of the stem of UNITED .srn'rnsi...

a'rnn'r oFFrcE;

H' Patented May 2T62 j 907; seriai No. 3611931.

. lain or of any other suitable material and "513} inner end ispreferably corrugated as shown.-

Around theelectrodej, a plurality of nonconducting plates '9 aremounted. beingslightly separated. from each other, as" by still smallerdisks h, and preferably forming a .series of disks-decreasingin sizetoward the endof the electrodef. The. other elec-- trode d may becurvedso that its up er end b or tip is brought within the. properistance from the end of the electrode], the curvature. of the electrodedvconfor'ming in general to thesloping of the edges of the series ofdisks.

The disks are formed preferably of'mica' and are mounted so as to becapable of vibrating or otherwise moving to a slight degree; and thismay be accomplished by fitting v them upon the electrode securely enoughto retain them but not rigidly enough'to pre- Means such as a washersmaybe provided to retain thQdlSkS if necessary.

The provision ofthe disks, as will beobvi' ous, will prevent theformation of sootjacross the inner end of the stem b between the"elecvent themfrom having somer'reedom of move-. ment. In this way thejar produced by the operation of the engine'will cause the disks tovibrate more or less.

trodes, and the vibration of the disksfwill odged deposit thereon. Thesoot therefore cannot readily bridge itself across from one electrode tothe other and thus cause-a short circuit in themanner heretofore pointedout.

. i It will be clear that the disks may be more or less resilient andhence may'vibra'te sufliciently even'when they are'made quitetighttotheelectrode. However, it is preferable to mounttheni ioosely upon theelectrode, as

- was stated hereinbefore. 'Itwill be clear-too that it will bepossibleto change the confj prevent the formation of a 'permanently"structionfof the plug inunany particulars" without departing front thespirit .of the-Jim ventlon.

I claim asimy inventionz' i 1. In a-sparking plug, the combination bf anelectrode, and insulation around thesarne." havil'ig armaportion and a-Vibrating por-- tion.

' 2. In a sparking plug, lfi e onlbinafi l- I an electrode and'alurality of non-conduct:

ing plates nioun'tei to vibrate on. the same and slightly .separatedfrom each other. 3. In a sparking plug,.the'colnbinationof an electrode,aplurality of non-conducting" electrode. v

in a sparking plug, the combination of an electrode projecting centrallytherefrom, an electrode projecting from one side, and a pinraiitv ofplates of a non-conducting ma.- niounted to vibrate on the firstelectrode and separated from each other.

5. in a sparking )lug, the combination of straight GlBCt-IOC eprojecting centrally therefrom, a curved electrode projecting from oneside, and a plurality of non-conducting plates mollntedto vibrate around the first electrode and slightly separated from each.

other.

In a,- sparking plug,the combination of anelectrode, and a plurality ofnon-conduct- Y disks mounted to vibrate around the electrode. I v

' in a sparking plug, the combination of means for maintaining theplates upon the an electrode and a serles of non-conductingdisks'loosely mounted around the electrode and decreasing in size towardthe end of the electrode.

8. In a sparkin plug, the combination of a straight electro e projectingtherefrom, a

the end of-the electrode, and a curved electrode rojectingl'rom oneside.

9. I a sparking plug, the combination of the two electrodes, and anoscillating interrupter of nonconducting material on one of the.electrodes to prevent the formation of a continuous line of soot betweenthe electrodes.

This s )ecification' signed and witnessed this 2nd ilay of March 1907.

Lotus KAN'IROWIIZ.

